/*
 * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
 * agreements. See the NOTICE file distributed with this work for additional information regarding
 * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance with the License. You may obtain a
 * copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */
package org.apache.geode.gradle;

import java.io.File;
import java.util.Set;

import com.google.common.collect.ImmutableSet;
import org.gradle.api.file.FileTree;
import org.gradle.api.internal.DocumentationRegistry;
import org.gradle.api.internal.classpath.ModuleRegistry;
import org.gradle.api.internal.tasks.testing.JvmTestExecutionSpec;
import org.gradle.api.internal.tasks.testing.TestClassProcessor;
import org.gradle.api.internal.tasks.testing.TestExecuter;
import org.gradle.api.internal.tasks.testing.TestFramework;
import org.gradle.api.internal.tasks.testing.TestResultProcessor;
import org.gradle.api.internal.tasks.testing.WorkerTestClassProcessorFactory;
import org.gradle.api.internal.tasks.testing.detection.DefaultTestClassScanner;
import org.gradle.api.internal.tasks.testing.detection.TestFrameworkDetector;
import org.gradle.api.internal.tasks.testing.filter.DefaultTestFilter;
import org.gradle.api.internal.tasks.testing.processors.MaxNParallelTestClassProcessor;
import org.gradle.api.internal.tasks.testing.processors.PatternMatchTestClassProcessor;
import org.gradle.api.internal.tasks.testing.processors.RestartEveryNTestClassProcessor;
import org.gradle.api.internal.tasks.testing.processors.RunPreviousFailedFirstTestClassProcessor;
import org.gradle.api.internal.tasks.testing.processors.TestMainAction;
import org.gradle.api.internal.tasks.testing.worker.ForkingTestClassProcessor;
import org.gradle.api.logging.Logger;
import org.gradle.api.logging.Logging;
import org.gradle.internal.Factory;
import org.gradle.internal.actor.ActorFactory;
import org.gradle.internal.operations.BuildOperationExecutor;
import org.gradle.internal.time.Clock;
import org.gradle.internal.work.WorkerLeaseRegistry;
import org.gradle.process.internal.worker.WorkerProcessFactory;

/**
 * Test executor that is used to replace gradles DefaultTestExecutor and does
 * not include a {@link RunPreviousFailedFirstTestClassProcessor} in the processor
 * chain.  This is used by the RepeatTest task.
 */
class OverriddenTestExecutor implements TestExecuter<JvmTestExecutionSpec> {
  private static final Logger LOGGER = Logging.getLogger(OverriddenTestExecutor.class);

  private final WorkerProcessFactory workerFactory;
  private final ActorFactory actorFactory;
  private final ModuleRegistry moduleRegistry;
  private final WorkerLeaseRegistry workerLeaseRegistry;
  private final BuildOperationExecutor buildOperationExecutor;
  private final int maxWorkerCount;
  private final Clock clock;
  private final DocumentationRegistry documentationRegistry;
  private final DefaultTestFilter testFilter;
  private TestClassProcessor processor;

  public OverriddenTestExecutor(WorkerProcessFactory workerFactory, ActorFactory actorFactory, ModuleRegistry moduleRegistry,
                                WorkerLeaseRegistry workerLeaseRegistry, BuildOperationExecutor buildOperationExecutor, int maxWorkerCount,
                                Clock clock, DocumentationRegistry documentationRegistry, DefaultTestFilter testFilter) {
    this.workerFactory = workerFactory;
    this.actorFactory = actorFactory;
    this.moduleRegistry = moduleRegistry;
    this.workerLeaseRegistry = workerLeaseRegistry;
    this.buildOperationExecutor = buildOperationExecutor;
    this.maxWorkerCount = maxWorkerCount;
    this.clock = clock;
    this.documentationRegistry = documentationRegistry;
    this.testFilter = testFilter;
  }

  @Override
  public void execute(final JvmTestExecutionSpec testExecutionSpec, TestResultProcessor testResultProcessor) {
    final TestFramework testFramework = testExecutionSpec.getTestFramework();
    final WorkerTestClassProcessorFactory testInstanceFactory = testFramework.getProcessorFactory();
    final WorkerLeaseRegistry.WorkerLease currentWorkerLease = workerLeaseRegistry.getCurrentWorkerLease();
    final Set<File> classpath = ImmutableSet.copyOf(testExecutionSpec.getClasspath());
    final Factory<TestClassProcessor> forkingProcessorFactory = new Factory<TestClassProcessor>() {
      @Override
      public TestClassProcessor create() {
        return new ForkingTestClassProcessor(currentWorkerLease, workerFactory, testInstanceFactory, testExecutionSpec.getJavaForkOptions(),
            classpath, testFramework.getWorkerConfigurationAction(), moduleRegistry, documentationRegistry);
      }
    };
    final Factory<TestClassProcessor> reforkingProcessorFactory = new Factory<TestClassProcessor>() {
      @Override
      public TestClassProcessor create() {
        return new RestartEveryNTestClassProcessor(forkingProcessorFactory, testExecutionSpec.getForkEvery());
      }
    };
    processor =
        new PatternMatchTestClassProcessor(testFilter,
                new MaxNParallelTestClassProcessor(getMaxParallelForks(testExecutionSpec), reforkingProcessorFactory, actorFactory));

    final FileTree testClassFiles = testExecutionSpec.getCandidateClassFiles();

    Runnable detector;
    if (testExecutionSpec.isScanForTestClasses() && testFramework.getDetector() != null) {
      TestFrameworkDetector testFrameworkDetector = testFramework.getDetector();
      testFrameworkDetector.setTestClasses(testExecutionSpec.getTestClassesDirs().getFiles());
      testFrameworkDetector.setTestClasspath(classpath);
      detector = new DefaultTestClassScanner(testClassFiles, testFrameworkDetector, processor);
    } else {
      detector = new DefaultTestClassScanner(testClassFiles, null, processor);
    }

    final Object testTaskOperationId = buildOperationExecutor.getCurrentOperation().getParentId();

    new TestMainAction(detector, processor, testResultProcessor, clock, testTaskOperationId, testExecutionSpec.getPath(), "Gradle Test Run " + testExecutionSpec.getIdentityPath()).run();
  }

  @Override
  public void stopNow() {
    if (processor != null) {
      processor.stopNow();
    }
  }

  private int getMaxParallelForks(JvmTestExecutionSpec testExecutionSpec) {
    int maxParallelForks = testExecutionSpec.getMaxParallelForks();
    if (maxParallelForks > maxWorkerCount) {
      LOGGER.info("{}.maxParallelForks ({}) is larger than max-workers ({}), forcing it to {}", testExecutionSpec.getPath(), maxParallelForks, maxWorkerCount, maxWorkerCount);
      maxParallelForks = maxWorkerCount;
    }
    return maxParallelForks;
  }
}
